Rubrius may possibly be identified with C. Rubrius C. f. of the S. C. de agro Pergameno (IGRP 4.262; Passerini, Athenaeum 15 [1937] 252-283). Niccolini (FTP 167) is inclined to follow Carcopino (Autour des Gracques 277) in having Fulvius go to Africa as commissioner in 123 and return to Rome in 122 when Gracchus went to Africa. If this be correct the Lex Rubria was passed fairly early in 123. It is true that Velleius, Eutropius and Orosius all date the colony in Africa under the Consuls of 123, but in this appear to go against the evidence of the Periochae of Livy and of Plutarch and raise difficulties regarding the development of the Gracchan program. The two accounts can technically be reconciled if the Tribunes of 122 brought the proposals forward in December, still under the Consuls of 123. In any case{520} they were subsequent to the elections of Tribunes for 122, and Acilius and Rubrius were Tribunes in the same college (see Last, CAH 9.887-896, where earlier discussions are cited). (Broughton MRR I)
Author of a law to establish a colony at Carthage as part of the Gracchan program (Lex Agr. of 111, CIL 1
.2.585; Plut. CG 10.2; cf. Liv. Per. 60; Vell. 1.15.4; App. BC 1.24; Lib. 136; Eutrop. 4.21; Oros. 5.12.1; Solin. 27.11 M). On the Lex Rubria Acilia, see above, on Acilius. (Broughton MRR I)
Tr. Pl. 122. Tibiletti has shown that the Lex Rubria to establish a colony at Carthage, being no longer associated in date with the tribunate of Acilius, should probably be placed early in 123 in order to allow time for the physical preparations for the colony and for the trip of C. Gracchus to Africa in 122 (Athenaeum 31, 1950, 1-100, esp. 31-33). See above, on M'. Acilius Glabrio (37). The Lex Rubria mentioned in the treaty between Rome and Astypalaea may be his law, or, as Badian points out, may be the work of an earlier Rubrius (Tibiletti, op. cit., 18, note 2; Badian, Gnomon 33, 1961, 497).
(Broughton MRR III)